Gcc's inline asm constraints have different meanings on x86_64 and ia32.
Include a 32 bit version for the rdtsc function. Drop the empty 32 bit
version of time_usec as it and the cpuid function both function properly
when compiled for 32 bit systems.
Tested on the following CPU:
Intel(R) Atom(TM) CPU E640 @ 1.00GHz
A value of
1000000000 was detected.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Cc: "Ylinen, Mikko" <mikko.ylinen@intel.com>
__asm__ volatile ("rdtsc" : "=a" (a), "=d" (d));
return (d << 32) | a;
}
+#else
+static UINT64 ticks_read(void) {
+ UINT64 val;
+ __asm__ volatile ("rdtsc" : "=A" (val));
+ return val;
+}
+#endif
static void cpuid_read(UINT32 info, UINT32 *eax, UINT32 *ebx, UINT32 *ecx, UINT32 *edx) {
*eax = info;
return 1000 * 1000 * ticks / cpufreq;
}
-#else
-static UINT64 time_usec(void) { return 0; }
-#endif
static EFI_STATUS efivar_set_raw(const EFI_GUID *vendor, CHAR16 *name, CHAR8 *buf, UINTN size, BOOLEAN persistent) {
UINT32 flags;